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The use of wheel-individual drives on the steered axle simultaneously enables propulsion and implementation of steering assistance. This work presents a closed-loop and open-loop method for controlling wheel-selective drives with the aim of reducing the steering wheel torque. The proposed optimal linear-quadratic-integral controller achieves a high control quality while ensuring driving safety and reducing energy consumption.
Mechanical engineering & materials --- wheel individual --- steering assistance --- steering torque --- closed-loop control --- Open-loop control --- radselektiv --- Lenkkraftunterstützung --- Lenkradmoment --- Regelung --- Steuerung
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The consideration of discrete motor primitives in models of human motor control is essential for the realistic prediction of voluntary movements. In this book a formal movement model is derived from neurobiological findings as well as new identification and learning methods are presented for the secured determination of the model parameters. Both the model and the identification methods are demonstrated using the example of predicting human driver steering movements.
steering movements --- Modell --- Lenkbewegungenmotor primitives --- identification --- Prädiktion --- prediction --- model --- Bewegungsprimitive --- Identifikation
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The emergence of electric drives opens up new opportunities in vehicle design. For example, powerful in-wheel motors pro -vide unprecedented flexibility in chassis design and are suitable for distributed drive solutions, although implying non-trivial vehicle dynamics control problems. This work aims at a new differential steering concept relying only on passive steering linkages where the necessary steering moment about the kingpins is generated by traction force differences produced by in-wheel motors. For the analysis of the proposed steering concept, a tailored multi-body system model is introduced along with the associated steering control system. In addition, this work explores the general applicability of such a new steering concept by using multi-objective optimisation. For this purpose, various design objectives and constraints are defined with respect to the dynamic, steady-state and low-speed steering performance of the vehicle. The resulting behaviour of the proposed steering concept is investigated by various simulation experiments demonstrating a comparable steering performance to that of conventional passenger cars.
Electric vehicles. --- Steering-gear. --- Rudder --- Marine engineering --- EVs (Electric vehicles) --- Vehicles, Electric --- Motor vehicles
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Steering-gear --- Military & Naval Science --- Law, Politics & Government --- Naval Architecture --- History. --- History --- Rudder --- Marine engineering --- Shipping --- archaeology --- history [discipline] --- shipbuilding
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Yachts --- Stability of ships. --- Motion control devices. --- Automatic pilot (Ships) --- Steering-gear. --- Global Positioning System. --- Design and construction. --- Tecnological innovations.
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This book guides naval architects from the first principles of the physics of control surface operation, to the use of experimental and empirical data and applied computational fluid dynamic modelling of rudders and control surfaces. The empirical and theoretical methods applied to control surface design are described in depth and their use explained through application to particular cases. The design procedures are complemented with a number of worked practical examples of rudder and control surface design. The online companion site contains an extensive modelling data library,
Mécanique des fluides. --- Fluid mechanics. --- Navires --- Ships --- Gouvernails. --- Steering-gear. --- Hydrodynamique. --- Hydrodynamics. --- Hydrodynamics --- Naval architecture --- Stability of ships --- Rudder --- Marine engineering --- Dynamics --- Mécanique des fluides.
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The course keeping and manoeuvring requirements for a ship are governed by international maritime law. In assessing and predicting the course keeping and manoeuvring capabilities of the ship, knowledge is required of the rudder forces necessary to keep a course or facilitate a manoeuvre. The second edition of Marine Rudders, Hydrofoils and Control Surfaces includes up-to-date data and rudder design techniques that enable the rudder forces to be estimated, together with any interactions due to the hull and propeller. The new edition describes the design and application of hydrofoils including shape adaptive design, and their applications including hydrofoil craft, yachts, and kite surfing hydrofoils. The professional will also face the need to design control surfaces for motion control, such as roll and pitch, for surface vessels and submersibles, and the book contains the necessary techniques and data to carry out these tasks.
Steering-gear. --- Ships --- Hydrodynamics. --- Hydrodynamics --- Naval architecture --- Stability of ships --- Rudder --- Marine engineering --- Dynamics --- Vaixells --- Servomotor del timó --- Hidrodinàmica. --- Arquitectura naval --- Hidrodinàmica --- Dinàmica --- Estabilitat --- Enginyeria naval
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Kein anderer Industriezweig steht mehr für neue Technologien, schlanke Produktion, Globalisierung und moderne Arbeitsorganisation als die deutsche Automobilindustrie. Diese kann in ihrer Bedeutung für den Standort Deutschland kaum überschätzt werden, zumal sie in der Entwicklung, Produktion und im Vertrieb eine große Dynamik aufweist. Davon ausgehend wird das Anliegen verfolgt, ausgewählte Trends der Automobilindustrie am Beispiel der Volkswagen AG darzustellen. Dabei finden Marktveränderungen wie zum Beispiel die demografische Entwicklung und der Wertewandel, die flexible Fabrik aus Sicht der Steuer- und Fördertechnik und die moderne Fertigung in der Leichtmetall-Gießerei besondere Beachtung. Ein weiterer Schwerpunkt sind Informationstechnologien, Informationssysteme und Fahrerassistenzsysteme, die als soziotechnische Systeme betrachtet werden. Ferner werden neue Aufgaben und Handlungsfelder der Betriebsratsarbeit vorgestellt.
Automobiles --- Automobile industry and trade. --- Computer integrated manufacturing systems. --- Gearing --- Steering-gear --- Automobile engineering --- Automotive engineering --- Automotive industry --- Motor vehicle industry --- CIM systems --- Manufacturing, Computer integrated --- Computer-aided engineering --- Industrial engineering --- Flexible manufacturing systems --- Technological innovations. --- Design and construction. --- Steering-gear. --- Construction
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The Special Issue “Liquid Crystal Optical Devices” discusses recent developments in the rapidly advancing subject of liquid crystals (LCs).
n/a --- liquid crystal lenses --- optical phased arrays --- gold nanoparticles --- adaptive-focus lenses --- dielectric anisotropy --- liquid-crystal waveguides --- volume gratings --- beam steering --- Mueller matrices --- nematic --- optical fiber device --- liquid crystals --- optoelectronics --- polarization-selective devices --- tapered optical fiber --- waveguides --- fast response time --- Pancharatnam?Berry phase --- optical modulation --- depolarization --- liquid crystal --- optical switching devices --- dual frequency nematic --- phase modulation
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This book details the advanced actuators for IEVs and the control algorithm design. In the actuator design, the configuration four-wheel independent drive/steering electric vehicles is reviewed. An in-wheel two-speed AMT with selectable one-way clutch is designed for IEV. Considering uncertainties, the optimization design for the planetary gear train of IEV is conducted. An electric power steering system is designed for IEV. In addition, advanced control algorithms are proposed in favour of active safety improvement. A supervision mechanism is applied to the segment drift control of autonomous driving. Double super-resolution network is used to design the intelligent driving algorithm. Torque distribution control technology and four-wheel steering technology are utilized for path tracking and adaptive cruise control. To advance the control accuracy, advanced estimation algorithms are studied in this book. The tyre-road peak friction coefficient under full slip rate range is identified based on the normalized tyre model. The pressure of the electro-hydraulic brake system is estimated based on signal fusion. Besides, a multi-semantic driver behaviour recognition model of autonomous vehicles is designed using confidence fusion mechanism. Moreover, a mono-vision based lateral localization system of low-cost autonomous vehicles is proposed with deep learning curb detection. To sum up, the discussed advanced actuators, control and estimation algorithms are beneficial to the active safety improvement of IEVs.
curb detection --- intelligent vehicles --- autonomous driving --- electro-hydraulic brake system --- master cylinder pressure estimation --- vehicle longitudinal dynamics --- brake linings’ coefficient of friction --- ACC --- safety evaluation --- human-like evaluation --- naturalistic driving study --- driving behavior characteristic --- electric vehicles --- independent drive --- direct yaw control --- torque distribution --- ultra-wideband --- relative localization --- enhanced precision --- clock self-correction --- homotopy --- Levenberg–Marquardt --- electric power steering --- steering actuator --- driverless racing vehicles --- control --- autonomous vehicles --- lane-changing --- decision-making --- path planning --- four-wheel independent drive --- four-wheel independent steering --- path tracking --- handling stability --- active safety control --- electric vehicle --- intelligent sanitation vehicle --- trash can-handling robot --- truss structure --- multi-objective parameter optimization --- topology optimization --- discrete optimization --- multiple load cases --- intelligent electric vehicles --- driver behavior recognition --- multi-semantic description --- confidence fusion --- drift parking --- open-loop control --- supervision mechanism --- two-speed AMT --- in-wheel-drive --- shifting process --- selectable one-way clutch --- five-degree-of-freedom vehicle model --- pressure–position model --- recursive least square --- advanced driver assistant systems --- adaptive cruise control --- direct yaw moment control --- extension control --- model predictive control --- optimization design --- vehicle structure design --- uncertainty --- deceleration device --- tyre-road peak friction coefficient estimation --- tyre model --- normalization --- incentive sensitivity --- four-wheel steering --- semantic segmentation --- high-resolution atlas training --- super-resolution
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